Spares planning. Meridian 1. Document Number: Document Release: Standard Date: April Spares planning. Year Publish FCC TM

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1 Meridian 1 Document Number: Document Release: Standard Date: April 2000 Year Publish FCC TM Copyright Nortel Networks All Rights Reserved Printed in Canada Information is subject to change without notice. Nortel Networks reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant. This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules, and the radio interference regulations of Industry Canada. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at their own expense. SL-1 and Meridian 1 are trademarks of Nortel Networks.

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3 4 Revision history Page 3 of 32 April 2000 June 1999 October 1997 August 1996 August 1996 December 1995 July 1995 Standard This is a global document and is up-issued for X11 Release 25.0x. Document changes include removal of: redundant content; references to equipment types except Options 11C, 51C, 61C, and 81C; and references to previous software releases. Standard, release This document is reissued to include he NT5D03 Call Processor Card and minor edits. Changes to technical content are noted by revision bars in the margins. Standard, release Changes are noted by revision bars in the margins. Standard, release Changes to technical content are noted by revision bars in the margins. Standard, release This document is reissued to include the Fiber Remote Multi-IPE units. Changes to technical content are noted by revision bars in the margins. Standard, release This document is reissued to include the NT9D19 Call Processor Card and minor edits. Changes to technical content are noted by revision bars in the margins. Standard, release This document is reissued to include international information to create a global NTP and Meridian 1 option 81C. Changes to technical content are noted by revision bars in the margins.

4 Page 4 of 32 December 1994 April 1994 April 1993 December 1992 December 1991 December 1990 January 1990 Standard, release 7.0. This document is reissued to include Small Systems Multi Disk Unit (SMDU), option 51C, and failure rate information updates. Changes to technical content are noted by revision bars in the margins. Standard, release 6.0. This document is reissued to include information on Meridian 1 system option 61C. New information and changes to technical content are noted by revision bars in the margins. Standard, release 5.0. Standard, release 4.0. This document is reissued to include information on system option 81 and equipment required for compatibility with X11 release 18. New information and changes to technical content are noted by revision bars in the margins. Standard, release 3.0. This document is reissued to include technical content updates. Due to the extent of changes revision bars are omitted. Standard, release 2.0. Reissued to include MTBF information for station equipment. Standard, release Standard April 2000

5 6 Contents Page 5 of 32 About this document References Content list Definitions and assumptions Calculating spares requirements NFT values Failure rates

6 Page 6 of 32 Contents Standard April 2000

7 8 About this document Page 7 of 32 References This document is a global document. Contact your system supplier or your Nortel Networks representative to verify that the hardware and software described is supported in your area. This document provides the information needed to calculate and plan for spare (replaceable) equipment. This guide also provides hardware failure rates. See the Meridian 1Planning and Engineering Guide for: System Overview ( ) Installation Planning ( ) System Engineering ( ) Power Engineering ( ) Equipment Identification ( ) See the X11 software guide for an overview of software architecture, procedures for software installation and management, and a detailed description of all X11 features and services. This information is contained in two documents: X11 System Management ( ) X11 Features and Services ( ) See the X11 Administration ( ) for a description of all administration and maintenance programs, and see X11 System Messages Guide ( ) for information about system messages.

8 Page 8 of 32 About this document Standard April 2000

9 12 Page 9 of 32 Content list The following are the topics in this section: Definitions and assumptions 9 Calculating spares requirements 10 Definitions and assumptions Failure rate Failure rate equals the estimated number of failures for that item during one million (10 6 ) hours of operation. The only exception is to measurements for cabling or other items with low failure rates. Rates are also measured in Failures in Time (FIT) measurements. One FIT equals one billion (10 9 ) hours of operation. Sparing interval The sparing interval is the period of time that stocks of replaceable items should last without being replenished. This period is assumed to be one year following the installation of the system. Stock confidence level The stock confidence level is the allowed probability of not being out of stock when the sparing interval of one year is greater than 99.9 percent. Card ambient temperature The card ambient temperature is the average temperature of the air immediately surrounding the circuit card (usually higher than the ambient room temperature). Card failure rates in this document are based on a card ambient temperature of 40 degrees C (104 degrees F).

10 Page 10 of 32 Turnaround time for repair Equipment may be serviced at a repair house or at a centralized depot that serves subdepots. The turnaround time for the return-to-stock of a failed item is about ten working days (240 hours) from a repair house. The turnaround time for the return-to-stock of a failed item is about two working days from a centralized depot. Actual turnaround periods vary in the field. As the number of systems served increases, the percentage of replaceable items required in stock is reduced. Population range Population range is the quantity of each type of system in the area served by the depot. Spare stock size The quantity of spares for a given stock item depends on the sparing interval, stock confidence level, failure rate, turnaround time for repair, and population range. Calculating spares requirements Use the following procedure to calculate the number of spares required to stock a depot for a one-year sparing interval: 1 Determine the number (N) of in-service specified circuit cards serviced by the depot. 2 Look up the card failure rate (F) for the specified circuit card in Failure rates on page 19. Card failure rates are expressed in terms of the number of failures per million hours (10 6 ). 3 Determine turnaround time (T) in hours. For repair house service, turnaround time is typically ten working days (240 hours). For centralized depot service, turnaround time is typically two working days (48 hours). 4 Calculate the NFT value by multiplying N x F x T. 5 Look up the number of spares required in NFT values on page Standard April 2000

11 Page 11 of 32 Example: A centralized depot services 10,000 NT8D02 Digital Line Cards. The failure rate given for this card is 1.8 failures per 1 million hours. With a turnaround time of 48 hours: 1.8 NFT = 10,000 x x 48 = ,000,000 The number of spares required for an NFT value of = 6.

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13 18 NFT values Page 13 of 32 Table 1 translates NFT values to the number of spares required in stock. The following abbreviations are used: N Number in use F Failure rate T Turnaround time (in hours) Table 1 Number of spares required (Part 1 of 6) NFT values Number of NFT values From To spares From To Number of spares

14 Page 14 of 32 NFT values Table 1 Number of spares required (Part 2 of 6) NFT values Number of NFT values From To spares From To Number of spares Standard April 2000

15 NFT values Page 15 of 32 Table 1 Number of spares required (Part 3 of 6) NFT values Number of NFT values From To spares From To Number of spares

16 Page 16 of 32 NFT values Table 1 Number of spares required (Part 4 of 6) NFT values Number of NFT values From To spares From To Number of spares Standard April 2000

17 NFT values Page 17 of 32 Table 1 Number of spares required (Part 5 of 6) NFT values Number of NFT values From To spares From To Number of spares

18 Page 18 of 32 NFT values Table 1 Number of spares required (Part 6 of 6) NFT values Number of NFT values From To spares From To Number of spares Standard April 2000

19 28 Failure rates Page 19 of 32 The following tables list replaceable equipment and provide failure rates for that equipment: Table 1modules, and packaging Table 2power and cooling equipment Table 3circuit cards Table 4mass storage (disk drive) equipment Table 5station equipment Note: N/A indicates the failure rate is not available at this time. The failure rates are based on a circuit card ambient temperature of 40 degrees C (104 degrees F). This temperature is usually higher than the surrounding room temperature. Running the system at a lower temperature will increase the life expectancy of components and improve overall system reliability. There are many cables available from Nortel Networks. The approximate failure rate for most cables, based on failures in time per billion hours (10 9 ), is 0.5. For a detailed listing of cables, see Equipment Identification ( ).

20 Page 20 of 32 Failure rates Table 1 Failure rates of modules, and packaging Order code A A A A A A NT5D21AA NT5D21DA NT7D00AA NT7D00BA NT8D35AA NT8D35DC NT8D37AA NT8D37DC Description Fiber Remote Multi-IPE Single-mode (1-4 Superloops) (1-2 Superloops) Fiber Remote Multi-IPE Multi-mode (1-4 Superloops) (1-2 Superloops) Fiber Remote Multi-IPE Redundant Option, Single-mode Multi-mode Core/Network Module AC Core/Network Module DC Top Cap (AC) Top Cap (DC) Network Module AC Network Module DC Intelligent Peripheral Equipment (IPE) Module AC IPE Module DC Failure rate per 10 6 hrs Standard April 2000

21 Table 2 Failure rates of power and cooling equipment Failure rates Page 21 of 32 Order code Description Failure rate per 10 6 hrs A Power Failure Transfer Unit 5.70 NT6D40 PE Power Supply DC 1.60 NT6D41 CE Power Supply DC 0.61 NT8D06 PE Power Supply AC 2.10 NT8D21 Ringing Generator AC 2.02 NT8D22 System Monitor 1.00 NT8D29 CE Power Supply AC 1.27 NT8D52AB NT8D52DD NT8D53AB NT8D53AD NT8D56AA NT8D56AC Pedestal Blower Unit AC Pedestal Blower Unit DC Power Distribution Unit AC Power Distribution Unit (option 21A) CE Module Power Distribution Unit CE/PE Module Power Distribution Unit 2.00 N/A N/A N/A N/A N/A NT8D57AA PE Module Power Distribution Unit N/A QBL12 Battery Distribution Box 1.33 QBL15 Power Distribution Box 2.81

22 Page 22 of 32 Failure rates Table 3 Failure rates of circuit cards (Part 1 of 6) Order code Description Failure rate per 10 6 hrs NT1P61 Fibre Superloop Network Card 1.05 NT1P62 Fibre Controller Card 1.03 NT1P63 Electro-optical Interface 1.14 NT1R20 Off-Premises Station Analog Line Card 5.00 NT5D03AA Call Processor Card (48 Mbytes) N/A NT5D03BA Call Processor Card (64 Mbytes) N/A NT5D03CA Call Processor Card (80 Mbytes) N/A NT5D03EA Call Processor Card (112 Mbytes) N/A NT5D03FA Call Processor Card (128 Mbytes) N/A NT5D10AA Call Processor Card (48 Mbytes) N/A NT5D10CA Call Processor Card (64 Mbytes) N/A NT5D10EA Call Processor Card (80 Mbytes) N/A NT5D10JA Call Processor Card (112 Mbytes) N/A NT5D11 NT5D14 Line side T1 Line Card N/A NT5D12AA Dual DTI/PRI Card (DDP) 1.76 NT5K02 Flexible Analog Line Card 6.0 NT5K07 Universal Trunk Card for Hong Kong 4.3 NT5K09 Quad Density Receiver 1.5 NT5K10 Enhanced Dual Loop Buffer Card 1.0 NT5K17 Enhanced Dual Loop Buffer Card 1.9 NT5K18 Extended PPM CO Trunk Card Standard April 2000

23 Failure rates Page 23 of 32 Table 3 Failure rates of circuit cards (Part 2 of 6) Order code Description Failure rate per 10 6 hrs NT5K19 E&M/2280 Hz Trunk Card 2.2 NT5K20 Extended Tone Detector 2.2 NT5K21 XMFC/MFE Sender Receiver card 2.7 NT5K36 Direct Inward Dial/Direct Outward Dial Trunk Card for Germany 19.0 NT5K70 Central Office Trunk Card for Germany (8 units) NT5K71 Central Office Trunk Card for Germany (4 units) NT5K72 E&M Trunk Card for Germany 19.0 NT5K82 Central Office Trunk Card 4.6 NT5K83 E&M Trunk Card for Switzerland 19.0 NT5K83AA E&M Trunk Card for Denmark 2.5 NT5K83CA E&M Trunk Card for Norway 2.5 NT5K83DA E&M Trunk Card for Holland 19.0 NT5K83EA E&M Trunk Card for Australia 2.5 NT5K84AA NT5K84BA Direct Inward Dial Trunk Card for Switzerland Direct Inward Dial Trunk Card for Australia NT5K93 Central Office Trunk Card for Norway 4.6 NT5K99 Central Office Trunk Card for Spain 4.6 NT5K96 Flexible Analog Line Card without Message Waiting 6.0

24 Page 24 of 32 Failure rates Table 3 Failure rates of circuit cards (Part 3 of 6) Order code Description Failure rate per 10 6 hrs NT6D6003 Core Bus Terminator Card 0.23 NT6D65 Core to Network Interface Card 3.00 NT6D80AA Multi-purpose Serial Data Link Card 4.47 NT7D16 Data Access Card 4.07 NT7R51 Local Carrier Interface Card 2.40 NT7R52 Remote Carrier Interface Card 1.80 NT8D01AC NT8D01BC NT8D01AD NT8D01BA Controller-4 Card Controller-4 Card SMT Controller-2 Card Controller-2 Card NT8D02 Digital Line Card 1.80 NT8D03 Analog Line Card 5.10 NT8D04BA Superloop Network Card 2.32 NT8D09 Analog Message Waiting Line Card 5.80 NT8D14 Universal Trunk Card 3.40 NT8D15 E&M Trunk Card 3.70 NT8D16 Digitone Receiver Card 2.70 NT8D17 Conference/TDS Card 5.10 NT8D18 Network/DTR Card 7.30 NT8D41BA Quad Serial Data Interface Paddle Board NT8D72AB 2048 kbps Primary Rate Interface 5.62 NT9D19AA Call Processor Card (48 MB) NT9D19CA Call Processor Card (64 MB) Standard April 2000

25 Failure rates Page 25 of 32 Table 3 Failure rates of circuit cards (Part 4 of 6) Order code Description Failure rate per 10 6 hrs NT9D19HA Call Processor Card (96 MB) NT9D34 Enhanced Mass Storage Interface Card 2.26 NTAG03 Central Office Trunk Card for Holland 19.0 NTAG04 Central Office/Direct Inward Dial Trunk Card for Holland 19.0 NTAG26 Extended Multi-frequency Receiver TBD NTBK51 Downloadable D-Channel Daughterboard 1.24 NTCK16 Generic Central Office Trunk Card 4.6 NTND01 Integrated CPU/Memory Card (6 MB) 5.80 NTND01 Integrated CPU/Memory Card (12 MB) 5.90 QPC43 Peripheral Signaling Card 1.73 QPC71 E&M/DX/Paging Trunk Card 3.10 QPC250 Release Link Trunk Card 7.73 QPC311 Data Line Card (SL-1) vintage F and later QPC327 MFC Sender/Receiver Card QPC343 Ground Button Recall Line Card (A-Law) QPC353 Modem Pool Line Card (µ-law) 8.23 QPC354 Modem Pool Line Card (A-Law) 6.26 QPC397 MCDS Asynchronous Card QPC414 Network Card 3.00 QPC422 Tone Detector Card 17.40

26 Page 26 of 32 Failure rates Table 3 Failure rates of circuit cards (Part 5 of 6) Order code Description Failure rate per 10 6 hrs QPC430 Asynchronous Interface Line Card QPC432 4-Port Data Line Card 8.15 QPC441 Three-Port Extender Card 2.00 QPC449 Loop Signaling Trunk Card 2.27 QPC450 CO/FX/WATS Trunk Card 3.34 QPC451 SL-1 Line Card 5.15 QPC471 Clock Controller Card vintage H and later QPC /2500 Message Waiting Card 8.00 QPC526 PPM CO Trunk Card (A-law) QPC527 CO/FX/WATS Trunk Card (A-law) QPC532 Ground Button Line Card QPC540 Tone Detector Card 6.49 QPC574 Digitone Receiver Card 0.83 QPC578 Integrated Services Digital Line Card 2.72 QPC /2500 Line Card 3.70 QPC595 Dual DT Receiver Card (A-law) 6.28 QPC602 ROM Card Standard April 2000

27 Failure rates Page 27 of 32 Table 3 Failure rates of circuit cards (Part 6 of 6) Order code Description Failure rate per 10 6 hrs QPC609 Tone and Digit Switch Card 2.33 QPC628 CO Loop Start Supervisory Trunk Card 7.41 QPC659 Dual Loop Peripheral Buffer Card 2.75 QPC720 Primary Rate Interface Card 6.00 QPC841 Four-Port Serial Data Interface Card 2.30 Table 4 Failure rates of mass storage equipment Order code Description Failure rate per 10 6 hrs QMM43 Mass Storage Unit QMM45 Mass Storage Unit QMT102 Disk Drive Controller 3.23 QMT103 Hard Disk Drive QMT104 Floppy Disk Drive QPC584 Mass Storage Interface Card 2.26 QPC742 Floppy Disk Interface Card 3.23 QUW1 Magnetic Tape Unit QUW9 Magnetic Tape Unit 20.58

28 Page 28 of 32 Failure rates Table 5 Failure rates of station equipment Order code Description Failure rate per 10 6 hrs NE-500/ /2500 Telephone N/A NE-DGQC-35 Line Cord 3.50 NE-G3AR-35 Handset 0.50 NE-G3DRN-3 Console Handset 0.50 NE-T1 Transmitter 0.50 NE-U1 Receiver 0.50 NTZK06 M2006 Telephone 3.08 NTZK08 M2008 Telephone 3.10 NTZK16 M2616 Telephone 3.88 NTZK20 M2016S Telephone 5.87 NTZK22 M2216ACD-1 Telephone 4.68 NT6G00 M2250 TCM Console N/A QMT11 Asynchronous/Synchronous Interface Module 6.34 QMT12 Add-On Data Module 9.92 QPF23 Terminating Plug Standard April 2000

29 32 Index A ambient temperature, 9 Analog Line Card, 24 Analog Message Waiting Line Card, 24 assumptions, 9 Australia Direct Inward Dial Trunk Card, 23 E&M Trunk Card, 23 B Buffer Cards, 27 Bus Terminator Cards, 24 C Call Processor Card (NT9D19), 24 Call Processor Cards (NT5D03), 22 Call Processor Cards (NT5D10 ), 22 Call Processor Cards (NT5D10), 22 card ambient temperature, 9 CE Module Power Distribution Unit, 21 CE Power Suply DC, 21 CE Power Supply AC, 21 Central Office Trunk Card, 23 Holland, 25 Norway, 23 Spain, 23 Central Office Trunk Card (4 units) Germany, 23 Central Office Trunk Card (8 units) Germany, 23 Central Office/Direct Inward Dial Trunk Card Holland, 25 CE/PE Module Power Distribution Unit, 21 circuit cards, 22 Clock Controller Cards, 26 Conference/TDS Cards, 24 confidence levels, 9 Controller Cards, 24 Core/Network Module, 20 CPU/Memory Cards, 25 Page 29 of 32 D Data Access Cards, 24 Data Line Cards, 25 Data Link Cards, 24 Data Modules, 28 definitions, 9 Denmark E&M Trunk Card, 23 Direct Inward Dial Trunk Card Australia, 23 Switzerland, 23 Direct Inward Dial/Direct Outward Dial Trunk Card Germany, 23 Downloadable D-Channel Daughterboard, 25 Dual DTI/PRI Card (DDP), 22 E E&M Trunk Card, 24 Australia, 23 Denmark, 23 Germany, 23 Holland, 23 Norway, 23 Switzerland, 23 E&M/2280 Hz Trunk Card, 23

30 Page 30 of 32 Electro-optical Interface, 22 Enhanced Dual Loop Buffer Card, 22 Enhanced Mass Storage Interface Cards, 25 Extended Multi-frequency Receiver, 25 Extended PPM CO Trunk Card, 22 Extended Tone Detector, 23 Extender Cards, 26 F failure rates, 9 circuit cards, 22 modules, 20 packaging, 20 power equipment, 21 shelves, 20 station equipment, 28 storage equipment, 27 Failures in Time (FIT) measurements, 9 Fiber Remote Multi-IPE Multi-mode, 20 Fiber Remote Multi-IPE Redundant, 20 Fiber Remote Multi-IPE SIngle-mode, 20 Fibre Controller Card, 22 Fibre Superloop Network Card, 22 Flexible Analog Line Card, 22 Flexible Analog Line Card without Message Waiting, 23 Floppy Disk Interface Card, 27 G Generic Central Office Trunk Card, 25 Germany Central Office Trunk Card (4 units), 23 Central Office Trunk Card (8 units), 23 Direct Inward Dial/Direct Outward Dial Trunk, 23 E&M Trunk Card, 23 H Handsets, 28 Holland Central Office Trunk Card, 25 Central Office/Direct Inward Dial Trunk Card, 25 E&M Trunk Card, 23 Hong Kong Universal Trunk Card, 22 I Interface Cards, 24, 27 IPE Module, 20 L Line Cards, 24, 25, 26 Line Cords, 28 Line side T1 Line Card, 22 Local Carrier Interface Card, 24 M Magnetic Tape Units, 27 Mass Storage Interface Card, 27 MCDS Asynchronous Cards, 25 Message Waiting Cards, 26 modules, 20 N Network Cards, 24, 25 Network Module, 20 Network/DTR Cards, 24 NFT values, 13 Norway Central Office Trunk Card, 23 E&M Trunk Card, 23 NT5K10, 22 NT5K17, 22 NT5K19, 23 O OFf-Premises Station Analog Line Card, 22 P packaging, 20 PE Module Power Distribution Unit, Standard April 2000

31 Page 31 of 32 PE Power Supply AC, 21 PE Power Supply DC, 21 Pedestal Blower Unit, 21 Peripheral Signaling Cards, 25 population ranges, 10 Power Distribution Unit AC, 21 power equipment, 21 Primary Rate Interface, 24 Q Quad Density Receiver, 22 R Receiver Cards, 24, 25, 26 Receivers, 28 Remote Carrier Interface Card, 24 repair time, 10 Ringing Generator AC, 21 ROM Cards, 26 time for repair, 10 Tone Detector Cards, 25, 26 Top Cap, 20 Transmitters, 28 Trunk Cards, 24, 25, 26, 27 turnaround, 10 U Universal Trunk Card Hong Kong, 22 X XMFC/MFE Sender Receiver Card, 23 S Sender Cards, 25 shelves, 20 Spain Central Office Trunk Card, 23 spare stock size, 10 spares planning calculating requirements, 10 definitions and assumptions, 9 NTF values in, 13 sparing intervals, 9 station equipment, 28 stock confidence levels, 9 storage equipment, 27 Switch Cards, 27 Switzerland Direct Inward Dial Trunk Card, 23 E&M Trunk Card, 23 System Monitor (NT8D22), 21 T telephones, 28 Terminating Plugs, 28

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34 Family Product Manual Contacts Copyright FCC notice Trademarks Document number Product release Document release Date Publish Meridian 1 Copyright Nortel Networks All rights reserved Information is subject to change without notice. Nortel Networks reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant. This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules, and the radio interference regulations of Industry Canada. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at their own expense. SL-1 and Meridian 1 are trademarks of Nortel Networks. Publication number: Document release: Standard Date: April 2000 Printed in Canada